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Item # IBS0024

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Item # IBS0024

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No, this isn’t something conceived under surgical lights in Trinidad, CO. The Ibis Tranny comes from the fertile minds at Ibis Cycles and is capable of quick and easy transformations from multiple gears to single-speed. It's light, strong, and ready for your next cross-country race or all day adventure. It even functions as the coolest, super-packable travel bike we’ve ever seen.

The Tranny is molded as a carbon fiber monocoque in two unique sections. The one piece front triangle looks fairly normal save for two spots -- the seatstay and chainstay junctions. These locations are designed to accept the rear triangle to produce the complete frame. At the seatstay junction, the wishbone is effectively bolted into a double shear bracket on the back of the seat tube and is shaped to allow a small degree of radial movement. This movement is essential for the bike to function as a single-speed. The junction behind the bottom bracket area is called the Slot Machine. As the name implies, there is a slot that allows the clamping hardware in the chainstays to have some fore and aft movement. This range of adjustment permits tensioning of the chain in single-speed applications, negating the need for an eccentric bottom bracket. Pull the Slot Machine all the way forward and you can run the Tranny geared with short chainstays for razor-like handling in tight trails. Toss the cassette and extra rings in the bin and run it as a single-speed with the Slot Machine pulled rearwards a bit, just enough to tension the chain. Are you flying somewhere for a mountain biking vacation? Just unbolt the whole enchilada and pack the thing away neatly in a suitcase and check it as regular baggage.

For all its utility, the Ibis Tranny remains true to its race-proven, hardtail roots. With its unified carbon construction, it is optimized for stiffness here and vibration damping there. It has top tube cable routing and a bolt-on alloy seatpost clamp. The removable cable stops for the front and rear derailleurs are a cool feature -- they get sandwiched under the bolt-on rear brake hose guides. No gears? Simply remove them and there will be no unsightly remnants to spoil the purity of your adventures. And, the single-speed specific dropout offers a nice bottle opener for post-ride celebrations.

The Tranny is available in four sizes – Small, Medium, Large, and XL and comes in Matte Clear (over naked carbon), Granny Smith Apple Green Metallic, and Copper Metallic. The Ibis Tranny is designed for use with a 100mm fork. It takes a 31.6mm seatpost and a 34.9mm traditional top-pull front derailleur. It features IS disc brake tabs and the aluminum headset cups accept a Cane Creek or similar IS integrated headset. 3.0 lbs (1360 g).

Ibis Cycles offers a 3 year warranty on the Tranny frame. Please follow this link to register your new bike.

Note: Not all front derailleurs will work with this frame. Please check the compatibility here.

Tech Specs

Frame Material:
carbon fiber
Recommended Fork Travel:
100 mm
Rear Axle:
10x135 mm
Replaceable Rear Derailleur Hanger:
yes
Head Tube Diameter:
IS42/IS42
Headset Included:
no
Bottom Bracket Type:
73 mm English
Front Derailleur Mount:
34.9mm clamp-on
Seatpost Diameter:
31.6 mm
Seat Collar:
34.9 mm Ibis
Cable Routing:
external
Compatible Components:
Shimano, SRAM
Recommended Use:
cross country racing, trail riding
Manufacturer Warranty:
3 years

Geometry chart

Ibis

Geometry Chart

 

Tranny
 A. Seat Tube
(c-t)
B. Effective Top TubeG. StandoverF. Head Tube LengthD. Head Tube AngleE. Seat Tube AngleC. Bottom Bracket HeightH. ChainstayWheelbase
S 15.0in 22.0in 27.2in 4.1in 70.0 deg 73.0 deg 12.0in 16.7in 40.7in
M 17.0in 22.8in 28.7in 4.5in 70.0 deg 73.0 deg 12.0in 16.7in 41.9in
L 19.0in 23.8in 28.8in 5.3in 70.0 deg 73.0 deg 12.0in 16.7in 43.0in
XL 21.0in 24.8in 29.5in 6.1in 70.0 deg 73.0 deg 12.0in 16.7in 44.0in

Ibis Tranny Geo

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